When the weather gets warmer here I plan on changing my radiator for something a little beefier as the coolant will be cooling a turbo also. I see some people running the koyo's and I'm wondering how much better they cool. It isn't just the bling factor is it?

 

I would like to know also

 

It helped a little, I saw a slight decrease of about 20 degrees consistently....These reading were through AEM compared to a stock radiator.

 

I am running one, but I haven't taken any temp readings. So, my response is not really helpful at all. I'm assuming that with a larger surface area to dispel heat, the larger radiator will lower the temps of the coolant more so than the stock one. (otherwise, I wasted my money)